Hi,
This program simply and easily turns your GMail account into online storage.
It'll appear as an extra drive on your "My Computer" and all you have to do is copy and paste files into it.
There are of course restrictions. One being file names can't be long, so keep them to a minimal ammount. And the other being you need a GMail account - so signup at www.gmail.com.
The program to turn it into an online storage is GSpace available at Gspace
Hope this isn't a repost, I find this program useful for storing important data like WoW account passwords and various music files.
If you provide your username and password to a friend or something, they can also get GSpace and download your files you've stored on the Gmail account. So make a new one to share files to your friends/family or random people off the net - don't use your main one!
Not sure what Googles stance on this is, been doing it for a while and my account hasn't been closed or warned.